I was wondering how some of you part off and flatten your bottoms on your vessels.
Currently when im done hollowing, I reverse the vessel and put it on a mandrel I have that has a long bar that will hit the bottom of the vessel and a cone in front that secures the opening. I then move the tailstock up to the rear securing it to the spur drive hole. It aligns it really well and I then turn it down between the waste block and the bottom of the vessel to a very small nub. At that point I saw it off and sand the nub down with a sanding flap wheel or sometimes take it over to the drill press and sand it flat with a small disk sander chucked in the press.
However, today I had a large vessel I had parted off and the best way I could think of to sand the bottom and keep it flat was to use the drill press with the disk mounted in it and hold it with both hands and sand it flat. It worked out "ok" but it took a bit of work because it is easy to not sand perfectly flat when your holding it and touching it to the spinning disk.
See pictures below of the Mandrel (Picture #1) and another project (unfinished) showling the tennon I leave before parting off.................
Anybody else doing it differently? and can you explain in some detail ? Im game to try another way.............LOL